Az-score of z = +1.00 indicates a position in a distribution Above the mean by 1 point. Above the mean by a distance equal to 1 standard deviation. Below the mean by 1 point. Below the mean by a distance equal to 1 standard deviation.

Q: Use the normal distribution of heights of adult women, which has a mean of 164 centimeters and a…

A: Here, μ=164 and σ=4

Q: Find the proportion of Normally distributed observations with a zz-score below -1.53.

A: It is given that the z-score below -1.53.

Q: Mean 255, x is 230 and z score is -2 find standard deviation

A:

Q: Scores for a standardized test are normally distributed with a mean of 1200 and a standard…

A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?

Q: Calculating the Standard Devation by Hand A student in a nutrition class wrote down the number of…

A:

Q: For 261 female heights, the mean was 66.4 inches and the standard deviation was 2.6 inches. The…

A: Given,Mean = 66.4 inchesStandard deviation (SD) = 2.6The shortest person in this sample had a height…

Q: Karen is in her first semester at a certain university and is taking a calculus course with a large…

A: The objective of this question is to calculate the z-score of Karen's exam score and interpret it in…

Q: Heights in centimeters of girls at the start of 1st grade are normally distributed with a mean of…

A: From the given information,   Mean = 125 Standard deviation = 5   The objective is to find the…

Q: Score on a certain nation-wide college entrance examination follows a normal distribution with a…

A: Given Information: Mean μ=110 Standard deviation σ=60 To find the approximate percentage that a…

Q: The distribution of the lengths of a commercially caught fish has a mean 25 cm and standard…

A: Let , X be the lengths of a commercially caught fish with mean μ=25 cm and standard deviation σ=5 cm…

Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…

A: It is given that  Mean, μ = 200 Standard deviation, σ = 9 Z-Score, Z = ( X - μ )/σ

Q: instructor gives a 100-point examination in which the grades are normally distributed. The mean is…

A: It is given that  Mean, μ = 66 Standard deviation, σ = 5

Q: Use the normal distribution of IQ scores, which has a mean of 110 and a standard deviation of 14,…

A: The mean is 110 and the standard deviation is 14.

Q: Average words in a romance novel is 64,253 and the standard deviation is 17,467 assuming the…

A: μ = 64253σ = 17467

Q: how do you find the standard deviation when the score is 9 points above tthe mean?

A: = population standard deviation = the size of the population = each value from the population =…

Q: Find the proportion of scores greater than 70 mean is 90 standard deviation is 10

A: The standard normal distribution:A continuous random variable Z is said to follow standard normal…

Q: Find the proportion of Normally distributed observations with a zz-score below 3.48. Give your…

A: Let Z be the random variable from standard normal distribution with mean (μ) = 0 standard deviation…

Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Define empirical rule first .  Empirical Rule :  The empirical rule, also referred to as the…

Q: A normal distribution has a mean of 80 with a standard deviation of 20 what score separates the…

A: Let x be the score which follows normal distribution with mean 80 and standard deviation 20. The…

Q: The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval…

A: According to the given data, first form the following table:IntervalFrequency(fi)Midpoint(xi…

Q: Average ACT = 540 with a standard deviation of 134. What is the probability that a high school…

A: X~N( μ , ?)μ=540     , ?=134Z-score =( x - μ )/?

Q: How does the curve change when the standard deviation is the same and the mean changes?

A: The mean is the center of symmetry of a curve or normal density curve.

Q: The mean always has a z-score (value) →

A: When the data is converted into z scores, the mean will always end up being zero.

Q: A distribution of values is normal with a mean of 107.8 and a standard deviation of 82.8. Find P70,…

A: given data, normal distribution μ=107.8σ=82.8p70 score  of the class =?

Q: Change z-score (-2.00) into X value – Mean = 50, standard deviation = 10

A: Standard normal distribution: The standard normal distribution is a special case of the normal…

Q: Part a) What is the probability that a Duxcell battery will last longer than an Infinitycell…

A: Given that lifetime of Duxcell batteries:  X(mu1=10,sigma1=2)lifetime of Infinitycell battery:…

Q: Lecture(10.1a): The mean of the population is 50. The standard deviation is 10. (a) if a persons's…

A:

Q: What method would you use to approximate the percent of women who lie within 2 standard deviations…

A: Given that,   Number of movies(x) frequency(f) f*x 20 25 500 21 10 210…

Q: TRUE OR FALSE: the standard deviation describes the average deviation between the individual scores…

A: The standard deviation is a measure of dispersion. It measures the data on how much they have…

Q: Isabel attends a fashion institute that has no on-campus housing. The distance she commutes between…

A: Given ,The  distance isabel's commutes between her home and the campus is , X = 19 kilometres.The…

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A: